Badge with number of documents in group navbar?

Is it possible to have a “badge” with the number of documents available similar to the way the number of members appears in that navigation bar?

<li id="members-groups-li" >
<a href="http://XXX.XXX/groups/volunteers/members/">Members
<span>12</span>
</a>

http://wordpress.org/extend/plugins/buddypress-docs/